What was found
RIGHT PACK LIGHT DURING CLIMBOUT. RESET TRIP BUT LIGHT CAME BACK. TURNED OFF PACK FOLLOWING CHECKLIST. GROUNDED - YES. ACCOMPLISHED FIM 21-53 TASK 802, FAULT ISOLATION. RAN RT PACK FULL HOT & FULL COLD FOR 3 HOURS, UNABLE TO CAUSE PACK TO TRIP. REMOVED & REPLACED THE RT COMPRESSOR DISCHARGE OVERHEAT SWITCH (390 F), (S935) RT PACK DISCHARGE DUCT OVERHEAT SWITCH, & (S939) RT TURBINE INLET OVERHEAT SWITCH AS A PRECAUTION IAW AMM 21-51-40, AMM 21-51-41 & AMM 21-51-42, OPS CHECKED NORMAL. ACCOMPLISHED A PACK/ZONE TEMP CONTROLLER NR 1 & 2 BITE TEST IAW AMM 21-61-00-700-806-002, OPS CHECKED NORMAL.